Answer:
The Peloponnesian War was a war fought in ancient Greece between Athens and Sparta—the two most powerful city-states in ancient Greece at the time (431 to 405 B.C.E.). This war shifted power from Athens to Sparta, making Sparta the most powerful city-state in the region.
It is C.
Step-by-step explanation:
War makes people die, death weakens states, therefore it is C. You're welcome.
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